User manual

53
Assembly
1. Replace the sealing disc in the diaphragm unit and
then place the sealing disc with spring in the cover
and press the diaphragm unit together. Check that
the spring ts into the recess for the sealing disc.
2
. Set the inhalation unit in the breathing valve and
screw the valve housing together with the locking
ring.
Comment: Only the locking ring should be turned. Otherwise there is a risk that the O-ring will be moved
causing a leak.
3. If the full-face mask is used, check that the O-ring in the bayonet coupling is not damaged and that it is
placed in the O-ring groove. Information about replacing the O-ring can be found under “Replacing an
O-ring (only full-face mask) in Section 12.4.4
”
Breathing valve”.
4. If a full-face mask is used, connect the breathing
valve in the bayonet coupling by turning the breath-
ing valve counterclockwise. Mount the xing cover
on the full-face mask and tighten the two screws.